Conversations ABC listen

Writer Lech Blaine on Peter Dutton, the former policeman who became the leader of the Liberal Party of Australia

Scientist Tanya Latty on how a single-cell organism, slime mould, can solve complex problems in some remarkable ways (R)

What was on the "must-see" lists for tourists in 200 BCE? From the Hanging Gardens of Babylon to the Great Pyramids at Giza, historian Bettany Hughes is your tour guide through the seven wonders of the ancient world

Journalist Marina Kamenev on the changing story of our families in the 21st century (CW: discusses donor conception)

The investigative reporter reflects on her beloved Ringsend relatives and what drives her work holding powerful organisations to account (CW: discussion of suicide and confronting material)

Tom Gleeson discovered and honed his distinctively caustic, laconic style of humour in some unlikely places (R)